That re-implementation of solved things in engineer's favorite language/framework does not happen for free. Its pretty clear from outside that company like Twit

That re-implementation of solved things in engineer's favorite language/framework does not happen for free. Its pretty clear from outside that company like Twitter is jerked around by its engineers who have far too much autonomy to implement things their way instead of high perf C/C++ that any company at Twitter's scale must use. Twitter engineers endlessly tweeting about having JVM perf team, presumably for their low performance Scala codebase. Here [1] is an example where supposedly Twitter's supposedly Silicon valley calibre engineers couldn't write a half decent log management system and end up using vendor which otherwise only boring enterprises would use. It reminds me of ignoramuses at Yahoo would claim that Google's frugality is useless and they can do better by just buying from Sun/IBM/HP and so on. 1. https://blog.twitter.com/engineering/en_us/topics/infrastructure/2021/logging-at-twitter-updated https://blog.twitter.com/engineering/en_us/topics/infrastruc...